After the new technique was applied to production, the factory has produced ______ over the same period last year.

A．many cars twice as

B．twice as many as cars

C．twice cars as many as

D．twice as many cars as

哪类GPRS终端能够同时支持电路与分组连接？（）

A、A类

B、B类

C、C类

D、以上都可以